If you're looking for a ridiculously cool bong that is sure to impress, look no further than the dual action inline bubbler bong by Grav Labs. Aside from your average glass bong that only allows the smoking of dry herbs, the dual action inline has the ability to also be used for concentrates, waxes, and oils! Simply load the side of the bubbler bong that you wish to use (or both!) and enjoy one of the best smoking bongs on the planet. ﻿